Heat Exchanger Connecting Device and Heat Exchanger

ABSTRACT

The disclosure provides a heat exchanger connecting device and a heat exchanger. The heat exchanger connecting device includes a first sheet body and a second sheet body, wherein a plurality of protrusions are provided in a length direction of the first sheet body and the second sheet body, each of a plurality protrusions is provided with a through hole cooperating with a heat exchange tube, and the first sheet body and the second sheet body are buckled and fixed together. The connecting device in the disclosure can reduce the manufacturing cost and meet the requirements of mass production, is economical, allows the size of a flat tube micro-channel heat exchanger to be increased, and is not limited by the size of a stamping forming process, thereby economically solving the problem of the size of a heat exchanger, and increasing the application range of a product.

CROSS-REFERENCE TO RELATED APPLICATION(S)

The present invention is a national stage application of International Patent Application No. PCT/CN2019/113742, which is filed on Oct. 28, 2019 and claims priority to Chinese Patent Application No. 201811605421.1 filed on Dec. 26, 2018 and entitled “Heat Exchanger Connecting Device and Heat Exchanger”, the contents of which are hereby incorporated by reference in its entirety.

TECHNICAL FIELD

The disclosure relates to a technical field of heat exchange devices, and in particular, to a heat exchanger connecting device and a heat exchanger.

BACKGROUND

In general, common micro-channel heat exchangers are a flat rectangular solid. In order to increase the heat exchange performance and meet different application and installation requirements, micro-channel heat exchangers may also be made into large-size heat exchangers.

A common micro-channel heat exchanger uses a porous flat tube, which can be cut in any length after uncoiling. Generally, the length of a flat tube produced by a mold is fixed, and due to the limitation of the size of mold and stamping equipment, the length of a single flat tube does not exceed 1.2 m. For a product with the size exceeding 1.2 m, such as an air-cooled module heat exchanger, the length thereof is approximately 2.0 m, and thus a new heat exchanger must use a connecting device, and the purpose is to make the length of a stamping-formed flat tube break through the limitation of the size of mold and equipment, thereby expanding the application range of a product, and meeting more customer requirements.

However, the structures of existing connection devices are relatively complex, and the production efficiency thereof is low, so that it is inconvenient to perform standardized production of heat exchangers.

SUMMARY

The main object of the disclosure provides a heat exchanger connecting device and a heat exchanger, so as to solve the problems in the prior art that the structure of heat exchanger connecting devices is complex and the production efficiency thereof is low.

In order to solve the above object, according to one aspect of the disclosure, a heat exchanger connecting device is provided, including: a first sheet body and a second sheet body, wherein a plurality of protrusions are provided in a length direction of the first sheet body and the second sheet body, each of the plurality of protrusions is provided with a through hole cooperating with a heat exchange tube, and the first sheet body and the second sheet body are symmetrically buckled and fixed together.

In some embodiments, a top surface of each of the plurality of protrusions is a flat surface, and the through hole is provided on the flat surface.

In some embodiments the through hole is an elongated hole, and a length direction of the elongated through hole is the same with a width direction of the first sheet body and the second sheet body.

In some embodiments, the plurality of protrusions on the first sheet body and the second sheet body have the same structure and size, and the thicknesses of the first sheet body and the second sheet body are both 1 mm to 2 mm.

In some embodiments, the first sheet body and the second sheet body are fixed together by brazing.

In some embodiments, the plurality of protrusions are arranged at intervals, the outer circumferential plane of each of the plurality of protrusions on the first sheet body and the outer circumferential plane of each of the plurality of protrusions on the second sheet body are attached and fixed by brazing, and cavities formed by the plurality of protrusions are not communicated with each other.

In some embodiments, the thickness of the heat exchanger connecting device in a convex direction of the plurality of protrusions is less than 10 mm.

In some embodiments, each of the plurality of protrusions are stamping protrusions, and the through hole is a stamping through hole.

In some embodiments, both of the first sheet body and the second sheet body are aluminum sheets, and each of the aluminum sheets each is a rectangular sheet-shaped structure.

According to another aspect of the disclosure, a heat exchanger connecting device is provided, including a first sheet body and a second sheet body, wherein plurality of protrusions are provided in a length direction of the first sheet body, through holes cooperating with a heat exchange tube are provided on each of the plurality of protrusions and the second sheet body, and the surface of the first sheet body away from each of the plurality of protrusions is buckled and fixed together with the second sheet body.

According to another aspect of the disclosure, a heat exchanger is provided, including a connecting device, wherein the connecting device is the above heat exchanger connecting device.

By applying the technical solutions of the disclosure, as the connecting device of the disclosure is formed by buckling and fixing a first sheet body and a second sheet body together, after buckling, corresponding protrusions on the first sheet body and the second sheet body enclose cavities, and flat tubes are connected by through holes on the protrusions. Compared with connecting devices in the prior art, the connecting device in the disclosure can reduce the manufacturing cost and meet the requirements of mass production, is economical, allows the size of a flat tube micro-channel heat exchanger to be increased, and is not limited by the size of a stamping forming process (a mold and a press), thereby economically solving the problem of the size of a heat exchanger, and increasing the application range of a product.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings described herein are used to provide a further understanding of the disclosure, and constitute a part of the present application, and the exemplary embodiments of the disclosure and the description thereof are used to explain the disclosure, but do not constitute improper limitations to the disclosure. In the drawings:

FIG. 1 shows a schematic diagram of a stereoscopic view of a heat exchanger connecting device of the disclosure;

FIG. 2 shows a schematic diagram of a partial cross-sectional view of a heat exchanger connecting device of the disclosure;

FIG. 3 shows a schematic diagram of a stereoscopic view of a first sheet body of a heat exchanger connecting device of the disclosure;

FIG. 4 shows a schematic diagram of a front view of a heat exchanger connecting device of the disclosure;

FIG. 5 shows a schematic diagram of an A-A cross-sectional view of FIG. 4;

FIG. 6 shows a schematic diagram of a side view of a heat exchanger connecting device of the disclosure;

FIG. 7 shows a schematic diagram of a stereoscopic view of a heat exchanger of the disclosure; and

FIG. 8 shows a schematic diagram of an enlarged view of an area A in FIG. 7.

The following reference signs are included in the accompanying drawings: 10: first sheet body; 20: second sheet body; 30: protrusion; 31: through hole; 40. flat tube; 50: collecting pipe.

DETAILED DESCRIPTION OF THE EMBODIMENTS

It should be noted that the embodiments and the features in the embodiments of the disclosure can be combined without conflicts. Hereinafter, the disclosure will be described in detail with reference to the accompanying drawings in combination with the embodiments.

It should be noted that the terms used herein are for the purpose of describing particular embodiments only and are not intended to be limiting of exemplary embodiments in accordance with the disclosure. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise, besides it should be further understood that the terms “including” and/or “comprising” when used in this description, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

Referring to FIG. 1 to FIG. 8, according to an embodiment of the disclosure, a heat exchanger is provided. The heat exchanger includes a heat exchanger connecting device, flat tubes 40 and a collecting pipe 50, wherein one end portions of the flat tube 40 is connected to the collecting pipe 50, and two adjacent flat tubes 40 extending along a length direction of the heat exchanger are connected by the heat exchanger connecting device. The heat exchanger connecting device includes a first sheet body 10 and a second sheet body 20, wherein a plurality of protrusions 30 are provided in a length direction of the first sheet body 10 and the second sheet body 20, each of protrusions 30 is provided with a through hole 31 cooperating with a heat exchange tube, and the first sheet body 10 and the second sheet body 20 are buckled and fixed together.

As the connecting device in this embodiment is formed by buckling and fixing the first sheet body 10 and the second sheet body 20 together, after buckling, each of corresponding protrusions 30 on the first sheet body 10 and the second sheet body 20 enclose an cavity, and flat tubes are connected by the through hole 31 on each of the protrusions 30. Compared with connecting devices in the prior art, the connecting device in this embodiment can reduce the manufacturing cost and meet the requirements of mass production, is economical, allows the size of a flat tube micro-channel heat exchanger to be increased, and is not limited by the size of a stamping forming process (a mold and a press), thereby economically solving the problem of the size of a heat exchanger, and increasing the application range of a product.

A first sheet body 10 and a second sheet body 20 of a heat exchanger connecting device are designed symmetrically, and the number of connecting units can be adjusted, so as to adapt to different customer requirements and implement standardized design. The heat exchanger connecting device is formed by stacking sheet bodies formed by stamping the first sheet body 10 and the second sheet body 20, and the two sheet bodies have the same structure; a certain number of protrusions 30 are stamped on each of the sheet bodies, a through hole 31 is provided on an end surface of each of the plurality of protrusions 30, and the number of protrusions 30 is flexibly increased or reduced depending on the number of flat tubes; and the flat tubes of the heat exchanger are inserted into the through holes 31 on the end surfaces of the plurality of protrusions 30, and a whole heat exchanger is formed after brazing.

In actual design, the surface of the first sheet body 10 away from the plurality of protrusions 30 on the first sheet body 10 and the second sheet body 20 in this embodiment are buckled and fixed together, so as to be connected to a heat exchange tube.

Top surfaces of the plurality of protrusions 30 in this embodiment are flat surfaces, and the through hole 31 is provided on each of the flat surfaces. The protrusions have a simple structure, are easy to process, and facilitate docking of the flat tubes of the heat exchanger. Preferably, the through hole 31 in this embodiment is an elongated hole, and a length direction of the elongated hole is the same with a widthwise direction of the first sheet body 10 and the second sheet body 20, so as to facilitate matching and connection with the end portions of each of the flat tubes. Of course, in other embodiments of the disclosure, a through hole 31 may also be set as a round hole or a polygonal hole, and all other variations under the conception of the disclosure belong to the scope of protection of the disclosure.

The plurality of protrusions 30 on a first sheet body 10 and a second sheet body 20 have the same structure and size, the thicknesses of the first sheet body 10 and the second sheet body 20 are both 1 mm to 2 mm, and the first sheet body 10 and the second sheet body 20 are fixed together by brazing.

Preferably, the plurality of protrusions 30 in this embodiment are arranged at intervals, and the outer circumferential plane of the plurality of protrusions 30 on the first sheet body 10 and the outer circumferential plane of the protrusions 30 on the second sheet body 20 are attached and fixed by brazing.

Joint surfaces of the two sheet bodies are attached to each other after brazing, the plurality of portions in the middle part are self-sealed, and front and rear flat tubes are inserted into the through holes 31 of the connection device to form a connection, so that the function is achieved. The cavities formed by the plurality of protrusions 30 are not communicated with each other, so that upper and lower flat tubes are not communicated with each other in series, and only a front flat tube and a rear flat tube, which two are connected to each other, are communicated with each other, thereby avoiding liquid flow and gas flow between tube bundles.

The thickness of the heat exchanger connecting device in this embodiment in a convex direction of the plurality of protrusions 30 is less than 10 mm, and the heat exchanger connecting device has little impact on the air side flow area of a micro-channel heat exchanger and has little impact on the air resistance and heat exchange performance.

Each of the plurality of protrusion 30 is a stamping protrusion, and the through hole 31 is a stamping through hole, which are easy to process and reduce the production cost of the heat exchanger connecting device.

Preferably, both of the first sheet body 10 and the second sheet body 20 in this embodiment are aluminum sheets, and each of the aluminum sheets is a rectangular sheet-shaped structure and has a good heat exchange effect. It can be determined that the heat exchanger connecting device in this embodiment is a high-strength aluminum plate with a double-sided composite solder. The connecting device is fed into a furnace together with a heat exchanger core body, so as to form a whole after brazing. The plurality of protrusions in the middle part can meet a usage pressure of 2.0 MPa to 4.5 MPa and a testing pressure of 13.5 MPa, and meets the requirements of a heat exchanger for pressure resistance and explosion in the refrigeration field.

When the heat exchanger is a heat exchanger with a size less than or equal to 2.4 m, one branch heat exchanger connecting device is used, and for a heat exchanger with a size greater than or equal to 2.4 m, the number of connecting devices may be increased according to an actual length.

From the above description, it can be determined that the described embodiments of the disclosure achieve the following technical effects:

the connecting device in the disclosure can allow the size of a formed flat tube micro-channel heat exchanger to be increased, and is not limited by the size of a stamping forming process (a mold and a press), thereby economically solving the problem of size, and increasing the application range of a product; the connecting device is manufactured by using a stamping process, which can reduce the manufacturing cost and meet the requirements of mass production, and is economical; connecting units of the connecting device are symmetrically designed, and the number of connecting units can be adjusted, so as to adapt to different customer requirements and implement standardized design; in addition, the thickness of the connecting device is less than 10 mm, and the connecting device has little impact on the air side flow area of the micro-channel heat exchanger and has little impact on the air resistance and heat exchange performance.

The above description is only preferred embodiments of the disclosure and not intended to limit the present disclosure, and for those skilled in the art, the present disclosure may have various modifications and variations. Any modifications, equivalent replacements and improvements, if under the spirit and principle of this disclosure, shall be included in the scope of protection of this disclosure. 

What is claimed is:
 1. A heat exchanger connecting device, comprising a first sheet body and a second sheet body, wherein a plurality of protrusions are provided in a length direction of the first sheet body and the second sheet body, each of the plurality of protrusions is provided with a through hole cooperating with a heat exchange tube, and the first sheet body and the second sheet body are buckled and fixed together.
 2. The heat exchanger connecting device as claimed in claim 1, wherein a top surface of the each of the plurality of protrusions is a flat surface, and the through hole is provided on the flat surface.
 3. The heat exchanger connecting device as claimed in claim 1, wherein the through hole is an elongated hole, and a length direction of the elongated hole is the same with a width direction of the first sheet body and the second sheet body.
 4. The heat exchanger connecting device as claimed in claim 1, wherein the plurality of protrusions on the first sheet body and the second sheet body have the same structure and size, and thicknesses of the first sheet body and the second sheet body are both 1 mm to 2 mm.
 5. The heat exchanger connecting device as claimed in claim 1, wherein the first sheet body and the second sheet body are fixed together by brazing.
 6. The heat exchanger connecting device as claimed in claim 5, wherein the plurality of protrusions are arranged at intervals, and an outer circumferential plane of the each of the plurality of protrusions on the first sheet body and an outer circumferential plane of the each of the plurality of protrusions on the second sheet body are attached and fixed by brazing, and cavities formed by the plurality of protrusions are not communicated with each other.
 7. The heat exchanger connecting device as claimed in claim 1, wherein a thickness of the heat exchanger connecting device in a convex direction of the plurality of protrusions is less than 10 mm.
 8. The heat exchanger connecting device as claimed in claim 1, wherein the each of the plurality of protrusions is a stamping protrusion, and the through hole is a stamping through hole.
 9. The heat exchanger connecting device as claimed in claim 1, wherein both of the first sheet body and the second sheet body are aluminum sheets, and each of the aluminum sheets is of a rectangular sheet-shaped structure.
 10. A heat exchanger connecting device, comprising a first sheet body and a second sheet body, wherein a plurality of protrusions are provided in a length direction of the first sheet body, through holes cooperating with a heat exchange tube are provided on each of the plurality of protrusions and the second sheet body, and a surface of the first sheet body away from the each of the plurality of protrusions and the second sheet body are buckled and fixed together.
 11. A heat exchanger, comprising the heat exchanger connecting device as claimed in claim
 1. 12. The heat exchanger as claimed in claim 11, wherein a top surface of the each of the plurality of protrusions is a flat surface, and the through hole is provided on the flat surface.
 13. The heat exchanger as claimed in claim 11, wherein the through hole is an elongated hole, and a length direction of the elongated hole is the same with a width direction of the first sheet body and the second sheet body.
 14. The heat exchanger as claimed in claim 11, wherein the plurality of protrusions on the first sheet body and the second sheet body have the same structure and size, and thicknesses of the first sheet body and the second sheet body are both 1 mm to 2 mm.
 15. The heat exchanger as claimed in claim 11, wherein the first sheet body and the second sheet body are fixed together by brazing.
 16. The heat exchanger as claimed in claim 15, wherein the plurality of protrusions are arranged at intervals, and an outer circumferential plane of the each of the plurality of protrusions on the first sheet body and an outer circumferential plane of the each of the plurality of protrusions on the second sheet body are attached and fixed by brazing, and cavities formed by the plurality of protrusions are not communicated with each other.
 17. The heat exchanger as claimed in claim 11, wherein a thickness of the heat exchanger connecting device in a convex direction of the plurality of protrusions is less than 10 mm.
 18. The heat exchanger as claimed in claim 11, wherein the each of the plurality of protrusions is a stamping protrusion, and the through hole is a stamping through hole.
 19. The heat exchanger as claimed in claim 11, wherein both of the first sheet body and the second sheet body are aluminum sheets, and each of the aluminum sheets is of a rectangular sheet-shaped structure.
 20. A heat exchanger, comprising the heat exchanger connecting device as claimed in claim
 10. 